Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 197 insertions, 0 deletions

diff --git a/drivers/char/drm/drm_memory.h b/drivers/char/drm/drm_memory.h
new file mode 100644
index 000000000000..422b94268709
--- /dev/null
+++ b/drivers/char/drm/drm_memory.h
@@ -0,0 +1,197 @@
+/** 
+ * \file drm_memory.h 
+ * Memory management wrappers for DRM
+ *
+ * \author Rickard E. (Rik) Faith <faith@valinux.com>
+ * \author Gareth Hughes <gareth@valinux.com>
+ */
+
+/* 
+ * Created: Thu Feb  4 14:00:34 1999 by faith@valinux.com
+ *
+ * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
+ * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <linux/config.h>
+#include <linux/highmem.h>
+#include <linux/vmalloc.h>
+#include "drmP.h"
+
+/**
+ * Cut down version of drm_memory_debug.h, which used to be called
+ * drm_memory.h.  
+ */
+
+#if __OS_HAS_AGP
+
+#include <linux/vmalloc.h>
+
+#ifdef HAVE_PAGE_AGP
+#include <asm/agp.h>
+#else
+# ifdef __powerpc__
+#  define PAGE_AGP      __pgprot(_PAGE_KERNEL | _PAGE_NO_CACHE)
+# else
+#  define PAGE_AGP      PAGE_KERNEL
+# endif
+#endif
+
+/*
+ * Find the drm_map that covers the range [offset, offset+size).
+ */
+static inline drm_map_t *
+drm_lookup_map (unsigned long offset, unsigned long size, drm_device_t *dev)
+{
+        struct list_head *list;
+        drm_map_list_t *r_list;
+        drm_map_t *map;
+
+        list_for_each(list, &dev->maplist->head) {
+                r_list = (drm_map_list_t *) list;
+                map = r_list->map;
+                if (!map)
+                        continue;
+                if (map->offset <= offset && (offset + size) <= (map->offset + map->size))
+                        return map;
+        }
+        return NULL;
+}
+
+static inline void *
+agp_remap (unsigned long offset, unsigned long size, drm_device_t *dev)
+{
+        unsigned long *phys_addr_map, i, num_pages = PAGE_ALIGN(size) / PAGE_SIZE;
+        struct drm_agp_mem *agpmem;
+        struct page **page_map;
+        void *addr;
+
+        size = PAGE_ALIGN(size);
+
+#ifdef __alpha__
+        offset -= dev->hose->mem_space->start;
+#endif
+
+        for (agpmem = dev->agp->memory; agpmem; agpmem = agpmem->next)
+                if (agpmem->bound <= offset
+                    && (agpmem->bound + (agpmem->pages << PAGE_SHIFT)) >= (offset + size))
+                        break;
+        if (!agpmem)
+                return NULL;
+
+        /*
+         * OK, we're mapping AGP space on a chipset/platform on which memory accesses by
+         * the CPU do not get remapped by the GART.  We fix this by using the kernel's
+         * page-table instead (that's probably faster anyhow...).
+         */
+        /* note: use vmalloc() because num_pages could be large... */
+        page_map = vmalloc(num_pages * sizeof(struct page *));
+        if (!page_map)
+                return NULL;
+
+        phys_addr_map = agpmem->memory->memory + (offset - agpmem->bound) / PAGE_SIZE;
+        for (i = 0; i < num_pages; ++i)
+                page_map[i] = pfn_to_page(phys_addr_map[i] >> PAGE_SHIFT);
+        addr = vmap(page_map, num_pages, VM_IOREMAP, PAGE_AGP);
+        vfree(page_map);
+
+        return addr;
+}
+
+static inline unsigned long
+drm_follow_page (void *vaddr)
+{
+        pgd_t *pgd = pgd_offset_k((unsigned long) vaddr);
+        pud_t *pud = pud_offset(pgd, (unsigned long) vaddr);
+        pmd_t *pmd = pmd_offset(pud, (unsigned long) vaddr);
+        pte_t *ptep = pte_offset_kernel(pmd, (unsigned long) vaddr);
+        return pte_pfn(*ptep) << PAGE_SHIFT;
+}
+
+#else /* __OS_HAS_AGP */
+
+static inline drm_map_t *drm_lookup_map(unsigned long offset, unsigned long size, drm_device_t *dev)
+{
+  return NULL;
+}
+
+static inline void *agp_remap(unsigned long offset, unsigned long size, drm_device_t *dev)
+{
+  return NULL;
+}
+
+static inline unsigned long drm_follow_page (void *vaddr)
+{
+  return 0;
+}
+
+#endif
+
+static inline void *drm_ioremap(unsigned long offset, unsigned long size, drm_device_t *dev)
+{
+        if (drm_core_has_AGP(dev) && dev->agp && dev->agp->cant_use_aperture) {
+                drm_map_t *map = drm_lookup_map(offset, size, dev);
+
+                if (map && map->type == _DRM_AGP)
+                        return agp_remap(offset, size, dev);
+        }
+        return ioremap(offset, size);
+}
+
+static inline void *drm_ioremap_nocache(unsigned long offset, unsigned long size,
+                                        drm_device_t *dev)
+{
+        if (drm_core_has_AGP(dev) && dev->agp && dev->agp->cant_use_aperture) {
+                drm_map_t *map = drm_lookup_map(offset, size, dev);
+
+                if (map && map->type == _DRM_AGP)
+                        return agp_remap(offset, size, dev);
+        }
+        return ioremap_nocache(offset, size);
+}
+
+static inline void drm_ioremapfree(void *pt, unsigned long size, drm_device_t *dev)
+{
+        /*
+         * This is a bit ugly.  It would be much cleaner if the DRM API would use separate
+         * routines for handling mappings in the AGP space.  Hopefully this can be done in
+         * a future revision of the interface...
+         */
+        if (drm_core_has_AGP(dev) && dev->agp && dev->agp->cant_use_aperture
+            && ((unsigned long) pt >= VMALLOC_START && (unsigned long) pt < VMALLOC_END))
+        {
+                unsigned long offset;
+                drm_map_t *map;
+
+                offset = drm_follow_page(pt) | ((unsigned long) pt & ~PAGE_MASK);
+                map = drm_lookup_map(offset, size, dev);
+                if (map && map->type == _DRM_AGP) {
+                        vunmap(pt);
+                        return;
+                }
+        }
+
+        iounmap(pt);
+}
+
+